Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
As Waltham Cross welcomes September, the average high-temperature is noted at a refreshing 18.6°C (65.5°F), closely aligning with the preceding month. Waltham Cross reports an average low-temperature of 11.1°C (52°F) during the nights of September.Humidity
In Waltham Cross, the average relative humidity in September is 77%.Rainfall
In September, in Waltham Cross, the rain falls for 11.5 days. Throughout September, 22mm (0.87") of precipitation is accumulated. In Waltham Cross, during the entire year, the rain falls for 160.4 days and collects up to 337mm (13.27") of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:00 am and sunset at 6:39 pm BST.
Sunshine
In Waltham Cross, the average sunshine in September is 7.2h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Make use of precautions - It is urged to ward off sun damage. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Waltham Cross in September?
What is the average humidity in September in Waltham Cross?
How many days does it rain in September in Waltham Cross?
When it does not snow in Waltham Cross?
How many hours of daylight does Waltham Cross have in September?
When are sunrise and sunset in September in Waltham Cross?
How long on average sun shines in September in Waltham Cross?
What is the UV index reading in September in Waltham Cross?
Average temperature in September
Waltham Cross, United Kingdom
- Average high temperature in September: 18.6°C
The warmest month (with the highest average high temperature) is July (21.7°C).
The month with the lowest average high temperature is January (6.5°C).
- Average low temperature in September: 11.1°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in September
Waltham Cross, United Kingdom
- Average pressure in September: 1016.8mbar
The months with the highest atmospheric pressure are May and September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in September
Waltham Cross, United Kingdom
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is February (17.9km/h).
The calmest month (with the lowest average wind speed) is July (12.8km/h).
Average humidity in September
Waltham Cross, United Kingdom
- Average humidity in September: 77%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Waltham Cross, United Kingdom
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is December (39mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Waltham Cross, United Kingdom
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is September (11.5 days).
Average snowfall in September
Waltham Cross, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Waltham Cross, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Waltham Cross, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is August (Average sunshine: 8h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Waltham Cross, United Kingdom
- Average sunshine days in September: 15 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in September
Waltham Cross, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Waltham Cross, United Kingdom
- Average cloud cover in September: 49
The month with the most cloud cover is February (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 49).
Average visibility in September
Waltham Cross, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
